Improvement in embroidering attachments for sewing-machines



W. A. MACK. EMBROIDERING ATTACHMENT FOR SEWING MACHINES.

N0.111,0'71. Patented Jan.1'7,1871'.

tliuiirt Stain WILLIAMA. MACK, OF NORWALK, OHIO.

Letters Patent No. 111,071, dated January 17, 18.71.

IMPROVEMENT IN EMBROIDERING ATTACHMENTS FOR SEWING-MACHINES.

The Schedule referred to in these Lettl'siiatent a d making part of thesame Nature and Object of my Invention.

My invention relates to the means of actuating the arms of embroideringattachments of sewing-machines in an absolute manner, co-ordinately withthe movements of the needle-bar, needle, and feed devices of suchmachines.

Description, of the Accompanying Drawing.

Figure 1 is an elevation of one side of the attachment, fastened inplaceto a sewing-machine.

Figure 2 is an elevation of the opposite side of the same.

Figure 3 is a front'view ofthe same.

Figure 4 is a top view of the slotted arms and slotted foot of the bodypart.

Figure 5 is the cam-side of the wheel I, and

Figure 6 is the ratchet-side of the same.

The same letters represent the same parts.

A represents the embroider-arms;

B, the body, to which the details are secured, and which is itselfsecured to the head of the sewing-machine b, a lever of the third class,for actuating the arms A;

b, a boss or branch of the body B, to which the vibrating arms A and thespring-stop S S are secured; a

b", a boss or branch of the same, to which the lever b is secured at itsupper end;

, b', a boss on the needle-bar, engaged by the fork of the lever f u (lI), double guide and tension-bntton;

e e, eyes, carrying-the embroidery-thread or cord;

fa, a fork ended lever, which operates the attachment;

f, the foot-presser;

F, the foot har;

H, the sewing-machine head;

I I, the embroidery-spool spindles;

I, the sewing-machine thread-spindles; N, the needle-bar, and

N, the needle;

0 0, spools adjoining their spindle;

1), the slot-pin, running in the ,slot of the slotted cam S c, andsecured in the lever l);

p p, the pawl-pin;

1') s, the pawl-spring;

r, the ratchet-teeth in surface of the wheel \V;

S c, the slotted cam and surface of the same;

S l, the slot in the foot of the body B, made straight; S l, thecorresponding diagonal slots in the arms A S S, the stop-spring ofthe-rat t h, the three threads; and I t p, the terminal point of thelever b.

. I It is evident that the fork of the lever f a, 'engag ing the boss1/, may be replaced by a solid continuation or arm of that lever,working between two pins on the needle-bar; and also that the lever I)might be replaced by a lever of the first class, operated by substantially the same devices.

The operation of the invention is as follows, viz:

Commencing with theparts in the respective relations represented in fig.2, it will be seen that the downward movement of the needle-bar willtend to depress the fork-ended lever f a. The relative proportions andmovements are adjusted to, and will thereupon cause, the pawl-pin 1) 12to be pressed up the incline of the ratchet-tooth against the resistanceof the pawl-spring p s until it reaches the surface of the wheel 7,when, the same motion continuing, the pawl-pin 1) p is slid along until,its position permitting, the action ofthe pawl-spring s 1) drops it intoor engages it with the next tooth.

\Vhile this has been 'occurring the needle and thread have penetratedthe cloth and formed an incipient stitch or loop over the cord ormaterial being embroidered on the cloth, at the point where the twothreads thereof cross each other. The needle-bar being about to actinreverse1l. 0., upward-the pawl-pin p11 engaging the tooth, when it movesthe lever f a, is carriedand, necessarily, the wheel \Vone step ortooth. By this movement the incipient stitch is perfected and theembroidery-stitch or cross secured.

At the beginning of the first movement and at the end of t-his last thespring-stop S S rests against a tooth, and prevents any backward motionofthe wheel W when the lever f a is depressed. If, now, the tooth of theratchet-wheel engaged by the pawl-pin p p dur ing this movement is oneof those just in front of an advanced point or angle of the interiorcam. of the opposite side of the-wheel \V, the cam-pin 1) of the lever11 will have been forced down the retreating slot towardthe retreatedangle of the same earn. 0 and the center of the wheel This movementwill,of course, carry the lever 12 and the terminal pin t1) thereof back,ward toward the heel of the attachment, and this terminal pin moving inthe diagonal slots of each arm, which cross each other at an acuteangle, and being held and guided by the straight slot S l, the two armsA will be separated, and, consequently, the threads they each carry intheir eye-points e 0 will be crossedready for the next loop or stitchwhich the machine is preparing to make.

Yihen the needle-bar makes its next motion all the parts are stationary,as before, except the lever f a 'three slots previously described.

and its immediate attachments, until the clot-h is pnnctnred and thenext upward movementis imminent. The pawl-pin pp has meanwhile droppedinto or engaged the next tooth, and as 'the upward movement of theneedle-bar progresses the wheel \V makes another step, of which thereare ten, corresponding to the ten teeth on the ratchet-face. During thismovement the advancing side of the inner cam of the wheel W, acting uponthe pin 1) of the lever I), forces that pin and the lever outward fromthe center again, thus forcing the terminal pin t of the lever 71 towardthe 1 made for every revolution of the wheel W; and by continualrepetition of the action described continual embroidery may be done. Thefive points of the cam are not, however, absolute and necessary to theoperation of the attachn'ient, for their number may be ,varied, theother parts being organized accordingly. I The double bhtton d b carriesthe embroidery- "threarls, each with one or more turns thereon, led tothe same from the spools 0n the spindles I I of the spindle attachment,and led therefrom to the eyes of the embroidery-arms'c c, whence theyconnect with the progressing work. This double button performs thedouble function of guiding and creating a gentle and very suitabletension on the embroidery-thread.

XVhat I claim is- V V The combination, with the support or body B,arranged for attachment to the sevving-maehine, of the cam andratchet-wheel W, lever I), and slotted arms A, constructed, arranged,and operated as described.

WILLIAM A. MACK. Witnesses:

Erna A. PRAY, GEO. W. KNAPP.

